Recently I set up a Untangle server between the ISP router and teh main switch. The ISP router has some fixed ip mapped to local lan IP's. Now I wanted to give the External NIC of the untangle server a fixed Ip, but when I use a fixed ip, the internet is not working. But if choose the DHCP to Ext NIC & Set bridge mode in Internal NIC, the internet is working. But I want to configure the Ext NIC with a fixed IP ( Which is mapped to a True public IP) to control from outside... How to fix this problem...

14 Replies

In bridged mode both the external and internal NIC's have the same IP address which is why it is called bridged. If you put an external IP address on that then your internal network will not see it. You need to do all the routing on the ISP router so external IP on that and port map if you only have one IP address or assign/map an IP if you have multiple through to the internal IP of Untangle. If the ISP router actually presents an external IP address on its internal NIC then you need to set Untangle in router mode note bridge.

What model is the ISP router? Is it an all in one firewall/router Dlink home type thing or it it a pure router like a Cisco

My ISP router is Linksys WRG series. Now I have progressed to a step further. Now I can able to configure my Ext NIC a fixed ip (192.168.x.x) and Int NIC bridged to Ext NIC. But the problem now is, if i connect the cable from the ISP router to the EXT NIC. the internet is not working. Instead If i connect it to the INT NIC, then internet in UT is working fine. Also I connected the cable from the EXT NIC to Main Switch, the workstations can not ping the UT IP address. What would be the problem...? According to UT, it sees the onboard NIC as internal & intel 100/1000 PCI NIC card as external. I doubt whether the EXT NICis not working... or i have done any thing wrong....? or should i ask the ISP to keep the IP address of the EXT NIC in DMZ of the router...? pls guide...

Your subnet may well not be 192.168.1 as I am only using it as an example. The important thing is that everything from the Linksys to internal are all the same subnet and they are all unique IP addresses barring the two bridged NIC's.

To be honest I would dump the Linsys as untangle will do a better job on its own but it should work the way I have it above.

Yes your setup assumption is right. The router ip (Gateway) is 192.168.1.1 as given & configured by the ISP. I'm also pretty sure that the local lan is the in the range of 192.168.1.x. Also my question is

1. Why if I connect the cable from the router to the external NIC of the UT, the internet is not working rather if I connect the cable in the internal NIC, then internet works....!!!

2. Also is there a wau in th UT setup to change the extrenal NIC as internal & Internal NIC as external NIC.. ( this is just to try check the things are working).

3. also when the internet in UT works, it is not filtering anything... it seems th UT is not working as an additional layer....

this is a bit odd as it should all just work. I dont think there is anyway to swap NIC's around within Untangle other than a rebuild. Certainly not within the gui though there might be on command line. When its all connected together as it should be and from within untangle itself. Make sure you have it set to an external DNS server and then use the trouble shooting in network config. Do some if the tests in there to both your internal network and your external. Use 208.67.222.222 (open DNS) for your dns and you can also ping it. Also make sure that you have the firewall set to default pass just to make sure that isnt blocking anything.

do you have any vlans on your network? or all internal lan just 192.168 addresses?

if you have other subnets then you need to account for them x.x.x.x/16... if not no worries..

also 192 on the public could be causing an issue...

bridge will work fine but are you trying to hit this box from the outside? like for vpn?

your public IP should not be 192 / 172 / 10... if it is then you should change your internal ip structure at least on the 3rd octet (make your internal network 192.168.50.0 range - something other than ".1")

I don't think his 192 IP is public, my understanding was its on the LAN side of his router and is his private range.

If you can ping inside and outside but not from inside to out then your blocking something. take a look at your bypass rules and again check the untangle firewall, in bridge mode it should be set to default pass.

3. This UT is newly built with no rules & Blocks. Mostly the settings are by default

4. UT recognises onboard NIC as internal & PCI ethernet card as External, there is no confusion at all. All the way my question is why if i connect the cable from the router to External NIC, internet is not working, BUT if i connect the otherway (That is router to internal NIC) internet is working.

Is there any problem with the External NIC..? Also the router has some settings like public IP mapping to Local IP... becoz of this any problem...

I tried UT in my home with a single NIC, configure as a bridge, it works like a breeze.... but why this simple setup gives problem...

1st Post

I am also having problem in untangle in bridge mode.. i have a broadband connection with ISP router (192.168.1.1) and i setup untangle (192.168.1.2) in bridge mode and now i am not able to see any request on my untangle server from any of my internal clients so can anyone suggest the resolution.